The total elevation difference for Mount Whitney Trail is 6,687 feet, and that is higher than average. This is a long backcountry trail, so don't forget to pack enough supplies. Mount Whitney Trail is 13.2 miles long; it's considered a longer backcountry trek. This neighborhood does get very dry sometimes, so donít forget to check for any current fire restrictions before you go. Now, this is roughly a 2-day trek, so make sure you've got all your overnight gear packed. This is a one trailhead wilderness hiking trail, so in and out is the way to hike it normally. Some parts of Mount Whitney Trail are much higher up than other parts of the backcountry hiking trail which of course means you need to be prepared for different conditions on different parts of the backcountry hiking trail.